一种改性植物油润滑剂的合成与应用

Synthesis and application of modified vegetable oil lubricant for drilling fluid

随着石油勘探向海上和深部地层发展,复杂的地层条件对钻井液润滑剂的润滑性、环保性、高温稳定性等提出了更严格的要求,常见的植物油润滑剂由于其高温稳定性差难以满足上述条件。针对这一问题,以2-乙基己醇、过氧化氢、2-丁醇及大分子有机物ATC-M对大豆油进行改性合成了一种新型大豆油润滑剂SPRO-E。性能评价结果表明,在钻井液体系中加入2%的SPRO-E,230℃老化后润滑系数降低率达61.8%,表明润滑剂SPRO-E可抗温230℃,具有良好的高温稳定性。通过四球摩擦试验机测得润滑剂SPRO-E的最大无卡咬负荷PB为1491N,表明其形成的油膜强度高、抗摩能力强。润滑剂SPRO-E在新疆车排子区块某井进行了现场试验,应用结果表明,加入润滑剂SPRO-E后润滑系数大幅度降低,提高了钻井时速,起到了显著的降本增效的作用。

With the development of petroleum exploration to offshore and deep strata,complex formation conditions have put forward more stringent requirements on the lubrication,environmental protection and high temperature stability of drilling fluid lubricants.The common vegetable oil lubricants are difficult to meet the above conditions due to their poor high temperature stability.To solve this problem,a new soybean oil lubricant SPRO-E was synthesized by modifying soybean oil with 2-ethylhexanol,hydrogen peroxide,2-butanol and macromolecular organic matter ATC-M.The performance evaluation results show that the lubricating coefficient decreases by 61.8%after aging at 230℃by adding 2%SGRO-E into the drilling fluid system,which indicates that the lubricant SGRO-E can resist temperature at 230℃and has good high temperature stability.The maximum non-clamping load PB of lubricant SPRO-E is 1491N measured by four-ball friction testing machine,which indicates that the oil film formed by it has high strength and strong anti-friction ability.The field test of lubricant SPRO-E was carried out in a well of Chepaizi block,Xinjiang.The application results show that the lubricant SPRO-E significantly reduces the lubrication coefficient,increases the drilling speed,and plays a significant role in reducing cost and increasing efficiency.